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Property and Equipment Property and Equipment (Tables) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Property and Equipment [Abstract]    
Land and building $ 767 $ 767
Leasehold Improvements, Gross 55,005 40,147
Machinery and Equipment, Gross 5,808 5,833
Furniture and Fixtures, Gross 6,432 5,893
Computer equipment 30,676 26,191
Property, Plant and Equipment, Gross 98,688 78,831
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (53,403) (47,244)
Property and equipment, net $ 45,285 $ 31,587